Based on your query, the part number **KLS-B-B-R/Q** refers to a high-voltage, fast-acting ceramic tube fuse commonly manufactured by companies like **KLS Electronic**. --- ## 1. Technical Specifications The code describes a specific configuration of a fuse designed for circuit protection. Below are the typical technical parameters for this series: | Parameter | Specification | | :--- | :--- | | **Type** | Fast-Acting Ceramic Tube Fuse | | **Material** | Ceramic body with Silver-plated/Nickel-plated Brass caps | | **Dimensions** | Typically 5mm x 20mm or 6mm x 30mm | | **Interrupting Rating** | High (H) – Able to withstand high fault currents | | **Standard** | IEC 60127 or UL 248-14 | | **Operating Temp** | -55°C to +125°C | --- ## 2. Part Number Breakdown (Deciphering the Code) While naming conventions vary slightly by manufacturer, the **KLS-B-B-R/Q** nomenclature usually breaks down as follows: 1. **KLS**: The manufacturer prefix (KLS Electronic). 2. **B**: Indicates the physical size or series (often referring to the 5x20mm form factor). 3. **B**: Defines the speed characteristic (In this case, **Fast-Acting / Quick-Acting**). 4. **R**: Often refers to **RoHS Compliance** (Lead-free). 5. **Q**: Sometimes denotes packaging type (e.g., Bulk or Tape & Reel) or a specific safety certification. --- ## 3. Key Electronic Characteristics ### Fast-Acting Performance Unlike "Time-Delay" or "Slow-Blow" fuses, this part is designed to open almost instantly when an overcurrent occurs. It is used to protect sensitive components like: * IC (Integrated Circuits) * Semiconductors * Power supplies with no high inrush current ### Ceramic vs. Glass Because this is a **Ceramic (B)** series fuse: * It can handle higher voltages and currents than glass. * It contains a filler (usually sand) to quench the internal arc during a blow. * It will not shatter under high-pressure short circuits. --- ## 4. Typical Applications * **Consumer Electronics:** LCD Monitors, Power Adapters. * **Industrial:** Power supplies, Battery chargers. * **Appliances:** White goods and small household motor controls. ---